Silicone Rubber Hands

I had a scare with one of my rubber hand sculptures. I was showing one of the hands to my sculpture student and he set the hand down on newspaper. The silicone material picked up the ink and neither soap and water nor rubbing alcohol would clean the ink off. I freaked! The materials and process to make these hands is pricey so I did not want to have to make another hand. Luckily lacquer thinner did remove the newspaper ink so all was saved.